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invites a friend to sleep over. the next morning, shes dead. >> oh, my god! i dont feel a pulse. >> what in the world happened? how could this be? >> turned out this was no ordinary slumber party. >> we know from their phones that this was a planned event. they had discussed it. they took pictures. >> stories surfacing of a dangerous experiment. >> the main purpose of having the sleepover was to try it. >> an experiment that just might tempt other teens. >> we know its entered our high...

>> a bright and beautiful teen invites a friend to sleep over. the next morning, shes dead. >> oh, my god! i dont feel a pulse. >> what in the world happened? how could this be? >> turned out this was no ordinary slumber party. >> we know from their phones that this was a planned event. they had discussed it. they took pictures. >> stories surfacing of a dangerous experiment. >> the main purpose of having the sleepover was to try it. >> an experiment that just might tempt other teens. ...

dangerous experiment. >> the main purpose of having the sleepover was to try it. >> an experiment that just might tempt other teens. >> we know its entered our high school. >> why the clues in this mystery could save a life in your family. >> you have a lot of people watching "dateline" that need to talk to their kids. >> welcome to dateline. parents always worry there are so many dangers out in the world a teenager can face. but at a slumber party in your own basement? how could somet...

After more than a year of discussions centering around the Olathe Public Schools district bell schedule changes, staff and parents provided a final recommendation on what the district should do.

Frascone and i are wearing gloves is, if you touch that, you could absorb that and become -- the drug in there could affect you simply by absorption. >> reporter: and when you take a closer look, its easy to see how some tabs could be stronger than others. >> theres no way of knowing the amount of drug on this tab here and this individual tab here. >> they all look different. how would anybody know what theyre getting? >> that is the biggest problem and our biggest concern is that this whole pro...

Looks like trash. but inside, the drugs are so potent, investigators have to handle them with gloves. >> the reason that detective frascone and i are wearing gloves is, if you touch that, you could absorb that and become -- the drug in there could affect you simply by absorption. >> reporter: and when you take a closer look, its easy to see how some tabs could be stronger than others. >> theres no way of knowing the amount of drug on this tab here and this individual tab here. >> they all look d...